Chlorophyll is a green pigment that gives most plants their color and enables them to carry out photosynthesis, the process through which plants get energy from light. Chlorophyll absorbs light in the red and blue-violet portions of the visible spectrum; the green portion is not absorbed and, reflected, gives chlorophyll its characteristic green color. In what way is chlorophyll involved in leaves turning color every autumn?
P. G. Wodehouse
Back in the day
The Battle of Yorktown was part of the Union offensive called the Peninsular Campaign during the American Civil War. It occurred when several regiments under Union Major General George McClellan met a regiment of Confederate troops near Yorktown, Virginia. Union forces probed a weakness in the Confederate line and attacked it. They failed to exploit this weakness further, however, and the Confederate army eventually escaped, avoiding what fate planned for them by McClellan?
Born on a day like today
Tracy began his career as an actor in summer stock and went into film work in 1930. He won Academy Awards for his work in Captains Courageous, in 1937, and Boys Town, in 1938. Known as an actor of rugged strength and sensitivity, he appeared in Cass Timberlane, Father of the Bride, and as the only character in The Old Man and the Sea. He and Katharine Hepburn often worked together, making a delightful, intelligent team. How many films did the pair make?